Muffler is a resistive sound-absorbing and noise reducing principle that has good effects on medium and high frequency broadband characteristics, and a resistant sound-absorbing and noise reducing principle that has good effects on low, medium frequency, and pulsation characteristics, as well as micro perforated mufflers and impedance composite mufflers. Pipeline muffler products are mainly used for effective noise reduction of steam emissions from thermal equipment such as boilers and turbines in the power generation sector.